Write LOCATION to Cabrillo, and give CQ WW M/2 eight band changes an hour

CQ WW lists LOCATION as required, and the export never wrote it. It now
carries the ARRL section, state or province, or DX.

CQ WW M/2 has no stay on a band: it may make eight band changes in a clock
hour. It was getting the ten-minute stay that M/S has.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/Nonemm.Contests/Rules/CqWorldWide.cs

@@ -67,6 +67,13 @@ public sealed class CqWorldWide : Contest
 
     public bool HasSerialNumbers => false;
 
+    /// Multi-single stays ten minutes on a band, which is the category default.
+    /// Multi-two has no stay: it may make eight band changes in a clock hour.
+    public BandChangeRules BandChangesFor(ContestEntry entry) =>
+        EntryCategories.IsMultiTwo(entry)
+            ? new BandChangeRules(8)
+            : BandChangeRules.ForCategory(entry);
+
     public IReadOnlyList<ModeCategory> Modes => [mode];
 
     /// The report is fixed for the whole contest, so the sent exchange is the